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BDC (Bullet Drop Compensator)

Elevation turret or reticle markings that encode the required elevation correction for a specific load at preset ranges. Allows rapid correction without mental calculation. Load-specific: calibrating for one ammunition type does not apply to another.

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Related terms

4DOF modelCoriolis effectEötvös effectFire control system (FCS)Laser rangefinder (LRF)Magnus effectMiliradian (mil)MOA (minute of angle)Spin drift

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